Device for forming blisters

Details Device for forming blisters Device for forming blisters

1992-11-20

1994-05-17

Nguyen, Khanh

Plastic article or earthenware shaping or treating: apparatus

With means to retard or stop moving element

188 74, 188 83, 425384, 425388, B29C 5110, B29C 5122, B29C 5142

Patent

active

053122399

ABSTRACT:
A device for forming blisters in which a web material including a thermoplastic resin that is supplied to a rotary forming drum is heated and deformed by heat in accordance with the configuration of cavities provided on the rotary forming drum. A predetermined tension in the range of 5 kg/215 mm to 50 kg/215 mm is applied to the web material while feeding it. When the rotary forming drum consists of a polygonal drum, each peripheral surface of the drum is formed as a curved surface extending along an arc whose radius is larger than that of the circumscribed circle of the polygon. This invention can be used in a packing device for foods, drugs, etc.

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patent: 4750318 (1988-06-01), Matsuzawa
patent: 4889211 (1989-12-01), Carlson

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